Prussian blue analogues (PBAs) have been considered as one of the most promising candidates of aqueous batteries owing to their advantages such as large pore size, high safety, low solubility equilibrium constant, and adjustable output voltage. However, controllable synthesis of high-performance PBAs for aqueous batteries remains a challenging task due to the presence of unavoidable crystal defects, coordinated water, metal ion dissolution, and a stable window of limited aqueous solution. To address these challenges and achieve practical applications, significant efforts made and some key progress have been made. The structure and electrochemical behavior of PBA, such as electronic transfer, ion transport, ion diffusion, and material phase transitions, are extensively discussed. In addition, on the basis of a comprehensive introduction to the many challenges faced by the use of PBAs in aqueous batteries, we systematically summarized the synthesis routes of PBAs and modification strategies, such as acid/base chemical etching, inorganic/organic compound, transition metal doping. Finally, an insight into the future research directions and further development prospects of PBAs-based materials are proposed so as to facilitate the extensive application in the filelds of aqueous batteries. This review provides significant comprehension for construction and optimization of high-performance PBAs-based materials used in aqueous batteries.

中文翻译：

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迈向基于普鲁士蓝类似物的先进水性电池：从面临严峻挑战到可行的解决方案

普鲁士蓝类似物（PBA）因其孔径大、安全性高、溶解度平衡常数低、输出电压可调等优点而被认为是最有前途的水系电池候选之一。然而，由于不可避免的晶体缺陷、配位水、金属离子溶解和有限水溶液的稳定窗口的存在，用于水性电池的高性能PBA的可控合成仍然是一项具有挑战性的任务。为了应对这些挑战并实现实际应用，人们付出了巨大的努力并取得了一些关键进展。 PBA 的结构和电化学行为，如电子转移、离子传输、离子扩散和材料相变，得到了广泛的讨论。此外，在全面介绍PBA在水系电池中使用所面临的诸多挑战的基础上，我们系统总结了PBA的合成路线和改性策略，如酸/碱化学蚀刻、无机/有机化合物、过渡等。金属掺杂。最后，对PBA基材料的未来研究方向和进一步发展前景进行了展望，以促进其在水系电池领域的广泛应用。本综述对水性电池中使用的高性能 PBA 材料的构建和优化提供了重要的理解。